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X-Power O-Ring for Magazine Bases for Airsoft G-Series GBB Pistols

£4.99 £4.99

5 in stock

Seal the Leak, Save the Gas

Put an end to frustrating gas loss with the X-Power O-Ring for Magazine Bases for Airsoft G-Series GBB Pistols. Specifically engineered to cure the most common point of failure in gas blowback sidearms, this premium replacement seal restores an airtight fit to your magazine baseplate. Whether your current magazine is suffering from a slow, hissing leak or you are performing preventative maintenance before a major milism event, this durable O-ring ensures your green gas or CO2 stays securely trapped inside, giving you consistent power when you need it most.


Key Features & Performance

  • High-Density Nitrile Formula: Molded from an advanced rubber compound designed to resist extreme freezing temperatures caused by rapid gas expansion and cooling.
  • Optimized Cross-Section Profile: Tailored specifically to sit perfectly within standard G-series magazine base channels, preventing pinching or bunching during installation.
  • Chemical & Silicone Resistant: Built to withstand repeated exposure to high-pressure propellants and heavy silicone lubricants without swelling, warping, or cracking.
  • Instant Pressure Restoration: Immediately corrects baseplate leaks, ensuring your magazine maintains maximum gas volume for complete, lock-back slide cycling.
  • Universal G-Series Cut: Designed to fit a wide array of gas blowback Glock-style magazines across multiple airsoft generations.

The "Pro" Take

Every experienced airsoft tech knows that a sidearm is only as reliable as its magazines. Instead of spending thirty to forty pounds buying a completely new magazine when it starts leaking from the bottom, the X-Power O-ring offers a incredibly cheap and highly satisfying five-minute fix. What makes this seal a must-have in your toolkit is its specific material compound; standard hardware store O-rings will dry out and split under the intense cold of expanding airsoft gas, but this specialized compound remains incredibly pliable and sealed under pressure.


UK Spec & Site Performance

  • A Crucial Tech Accessory: Completely non-restrictive and universally compatible with both standard black and two-tone UKARA-regulated G-series sidearms.
  • Defeat the British Cold: Gas blowback pistols notoriously struggle in the chilly British climate due to the cooldown effect. This O-ring provides a superior seal that helps maximize gas efficiency during damp, cold-weather winter skirmishes.
  • Essential Kit Bag Insurance: A perfect, low-cost addition to your safe-zone maintenance kit, ensuring a leaky baseplate won't ruin your game day or force you to run a primary-only setup.
  • Maintains Peak Site Power: By preventing micro-leaks around the base pin or screw assembly, it ensures your pistol delivers consistent pressure to meet typical UK site limits up to 350 FPS smoothly.

Friendly FAQ

Q: Will this fit my specific brand of G-series pistol?
A: This O-ring is engineered to fit standard geometry G-series gas blowback magazines, making it highly compatible with major brands like WE Europe, Raven, VFC, Stark Arms, and Tokyo Marui format magazines.

Q: Do I need special tools to install this seal?
A: You will just need to slide off the plastic base plate cover, push out the securing pins (or undo the base plate screw depending on your brand), remove the old seal, drop this one in, and reassemble. It takes just a few minutes.

Q: Should I lubricate this O-ring during installation?
A: Absolutely. For the absolute best results and a perfect airtight seal, we highly recommend coating the new O-ring in a generous layer of high-viscosity airsoft silicone grease before seating it into the magazine base.

Q: Can this be used in CO2 magazines as well as Green Gas?
A: Yes. The high-density formulation is rated to handle the higher pressures associated with CO2 capsules, making it an excellent upgrade for both types of gas systems.

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BR Airsoft. place picture
5.0
Based on 108 reviews
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Chicken Mycatchicken profile picture
Chicken Mycatchicken
15:35 08 May 26
Visited the shop today for advice on my Lancer M4 with a broken Alpha stock..The Tech man was so helpful..Ended up leaving my M4 behind for a service..Totally recommend BR Airsoft..Lots of knowledge and very friendly..💣💥👍
Daniel Barton profile picture
Daniel Barton
10:49 10 Apr 26
Really helpful people
Colin Allen profile picture
Colin Allen
13:34 28 Mar 26
My son and I usually drop in when we are in the area; it is a great little shop with a surprising amount of stock and very helpful and knowledgeable staff. Highly recommended.
Alex Coen profile picture
Alex Coen
18:59 18 Mar 26
Loved my time here, fun range with the option to play with multiple shooters, and stocked store with knowledgeable staff.
Dan was very helpful
matt cook profile picture
matt cook
18:59 18 Mar 26
Been here a few times now. Friendly vibes great laugh and knowledgeable. The range is amazing.
James Dornan profile picture
James Dornan
05:02 18 Mar 26
Dan is extremely knowledgeable and passionate about airsoft. Excellent service, Dan took a long time to understand what we needed and made good recommendations. I cant rate this place highly enough. You can find some real bargains too vs online prices. Will be back.
Myla jones-hall profile picture
Myla jones-hall
21:26 22 Feb 26
amazing store, awesome staff and a great indoor range. all the staff are more than happy to talk with you and help you figure out what is best for you and the tech advice/work for any problems you may have with your airsoft kit is top notch. pricing is great and often times unbeatable for the location and connivence for getting hand on kit there and then.
Abigor Rise profile picture
Abigor Rise
20:43 09 Feb 26
​"It was my first time going to an Airsoft shooting range, and I didn't have much knowledge about Airsoft and guns. But when I went to BR Airsoft, they clearly explained everything to me from A to Z perfectly. The range itself was awesome. The staff were also very knowledgeable. I will definitely go there every week and practice at their range now."
Dave Wilson profile picture
Dave Wilson
14:14 01 Feb 26
Really helpful team, spent a couple of hours at the shop, purchased a new RIF as well as some other goodies! They run regular raffles as well and they're so much fun. Can't recommend these guys enough for their vast wealth of knowledge and connections in the industry. Asked for some specific upgrades and was directed to another local company who specialise in them. Amazing team!
Paul Hopkins profile picture
Paul Hopkins
11:51 30 Jan 26
Very very helpful, I'm a novice and James was very informative thanks to him I can now get started
Thomas Irwin profile picture
Thomas Irwin
16:21 23 Jan 26
Great hour on the range, friendly and knowlagavke staff. 10% recommend. Will return soon
Peter Wilkes profile picture
Peter Wilkes
23:07 10 Jan 26
Amazing. Took my son today and we loved it. Dan & John were really friendly, professional and very polite. Shown us how to operate the airsoft rifles and eqpt in the indoor range. When i went in the shop, they were really knowledgeable and even shown me other cheaper starter options and full set ups. They let me know about airsoft games and clubs in the local area and we cannot wait to come back again.

I've already decided to make my next purchase with these guys rather than the on line store. Great customer service and very highly recommended.
Michael Higham profile picture
Michael Higham
16:04 30 Dec 25
Brilliant wee shop, good range of products and great staff.
Jax Parrow profile picture
Jax Parrow
20:43 27 Dec 25
Great customer service, both online and in store, will definitely be shopping there again
Skikac99 profile picture
Skikac99
17:38 27 Dec 25
Great shop with even greater staff!
Can’t recommend enough 😊
Dean Fryer profile picture
Dean Fryer
17:10 27 Dec 25
An amazing selection of all things Airsoft, very knowledgeable staff and friendly from start to finish! If they haven’t got what you want they will source it
ben arnold profile picture
ben arnold
16:39 27 Dec 25
Very knowledgeable staff, good selection of stock, and fair prices. The indoor range with interactive targets is a massive plus too!
jon isaac profile picture
jon isaac
19:10 05 Dec 25
Great shop, has everything you may need. No pressure on sales and plenty of free advice available. Keep up the good work guys
oliver fenton profile picture
oliver fenton
18:21 02 Dec 25
Very good service, excellent knowledge, definitely worth a visit if you are in there area.
Cj Miles profile picture
Cj Miles
21:11 29 Nov 25
The shop is always stocked and the guys dan and ja will order any parts needed if not in stock they go above and beyond to help get you game ready and make sure they give you the best advice needed for specific parts etc always happy to help 👍🏼
James Ellis profile picture
James Ellis
11:18 31 Oct 25
This is a great airsoft shop, first time me and my son went they welcomed us in and gave us some great help and info. Highly recommended for any level of person starting out or heavily into airsoft . Keep up the great work guys
Laura Nevatt profile picture
Laura Nevatt
12:56 25 Oct 25
My son had an amazing morning trying airsoft in this safe and fun environment.
Dan's tuition was awesome, definitely recommend 👌
Niikolaas Gleavy profile picture
Niikolaas Gleavy
10:35 25 Oct 25
Most excellent! There are fewer and fewer businesses worth 5 stars, this is one of them. They're always friendly, knowledgeable and reasonably priced. I've used these guys a few times now and they haven't once disappointed. They will now be getting my exclusive business, they're worth it.
chaise lark profile picture
chaise lark
13:34 11 Oct 25
Loads of stock good advice from the staff and where very friendly guys was deffo worth my journey👍
Connor Sutherland profile picture
Connor Sutherland
17:08 03 Oct 25
Absolutely top shop. Staff are incredibly knowledgeable and willing to help. Stock is great and range is tons of fun. Highly recommended. Its the only airsoft shop I use
Alexander Read profile picture
Alexander Read
09:40 11 Sep 25
Ian profile picture
Ian
14:49 07 Aug 25
Great little place. Lots of pews, lots of kit, loads of knowledge and enthusiasm too! Visited whilst on holiday down in Cornwall and glad we did! Just tried out the CO2 grenades and yup, you were right, they're loud!! Visit this place and you won't be disappointed. 👍
Isaac rowley profile picture
Isaac rowley
13:00 07 Aug 25
Jake Gilbert profile picture
Jake Gilbert
10:44 11 Jul 25
Brilliant service and really happy to see people
Sam Orchard profile picture
Sam Orchard
10:43 11 Jul 25
Amazing staff very knowledgeable and friendly all ways good stuff to send my money on grate shop
Molly Marfleet profile picture
Molly Marfleet
15:34 09 Jul 25
My partner found these guys on facebook, amazing shop, great staff, great stock and I left with a happy man child
Andrew Williams profile picture
Andrew Williams
13:41 09 Jul 25
Great place to shop beginner friendly and great play to look to get items for your first game
Gethin Raymer profile picture
Gethin Raymer
12:22 09 Jul 25
Travelled from the West Midlands after seeing them on Facebook. Amazing shop, awesome stock, Dan was awesome. Well worth the trip down
Jonathan Brickell profile picture
Jonathan Brickell
20:30 02 Jul 25
With the recent heatwave I was looking for a self cooling mattress. I saw BR Airsoft advertising on line and they sounded perfect vendors. A nice brrrr air filled soft mattress will be perfect to keep me cool so I headed over. Imagine my surprise and slight embarrassment when, upon arriving at the establishment I found not a single mattress but lots and lots of Airsoft guns. I felt so foolish but thankfully the staff saw the funny side. It was useful as coincidentally I had 2 faulty Airsoft guns in the car. James in the shop fixed one and the other he gave me sound advice on how to resolve. Their shooting range also proved to be excellent value for money as well and helped prove the the fix. So 2 working Airsoft guns but still no mattress so I'm still at a loss there. Can anyone help?
Katherine Ellwood profile picture
Katherine Ellwood
16:46 02 Jul 25
Amazing shop, good for all your airsoft needs! Amazing indoor range and very freindly knowledgeable staff ( especially the tech James), knows his stuff and is very good with upgrades and repairing parts.

Highly recommended
Photo from customer review