KWA M1911 MK Series 21-Round Magazine
The KWA M1911 MK Series 21-round magazine is the green gas magazine for KWA’s M1911 MK series, including the 1911 MK IV PTP. It also fits and functions in the M1911A1.

KWA Rewards
Earn 50 points on this item, worth $1.00 in store credit. New members get 100 points for signing up and 500 bonus points on their first order.
How KWA Rewards worksPay over time
Pay with Klarna in 4 interest-free payments, or with Affirm, on eligible orders. Choose either at checkout.
See payment optionsFree shipping over $200
Orders over $200 ship free in the contiguous US. Stock up on spares with your next order.
Shipping detailsKlarna and Affirm are subject to approval. See payment terms. A higher initial payment may be required for some consumers. CA resident loans made or arranged pursuant to a California Financing Law license.
What the M1911 MK Series 21-Round Magazine fits
| Fits | Notes |
|---|---|
| 1911 MK IV PTP, Black | Standard magazine |
| 1911 MK IV PTP, OD Green | Standard magazine |
| M1911A1 | Fits and functions. Not its stock magazine |
Need a different magazine? See the KWA magazine compatibility chart for every KWA magazine and the guns it fits.
The stock magazine for the M1911 MK series only.
About the M1911 MK Series 21-Round Magazine
- Holds 21 rounds
- Green gas
- Stock magazine for the M1911 MK series
- Also fits the M1911A1
M1911 MK Series 21-Round Magazine specs
| Capacity | 21 rounds |
|---|---|
| Power | Green gas |
| Type | Gas blowback pistol magazine |
| Fits | 1911 MK IV PTP, Black, 1911 MK IV PTP, OD Green, M1911A1 |
| SKU | 197-01302 |
Using the M1911 MK Series 21-Round Magazine
Filling a green gas magazine
Green gas is stored in the magazine, and each shot uses some of it to fire the BB and cycle the slide.
- Hold the magazine upside down and the green gas can upside down and vertical.
- Press the can straight down onto the magazine fill valve until it stops taking gas.
- Load BBs, insert the magazine and you are ready.
- Gas cools as you shoot. Let magazines warm up between strings and keep them out of direct sunlight.
Care and parts
- Put a drop of silicone oil on the magazine seals now and then to keep them sealing well.
- Store gas magazines in a cool, dry place and never in direct sunlight or a hot car.
- Check feed lips and seals before each game, and do not drop magazines on hard surfaces.
- Wipe the gun down after each game and keep the inner barrel and hop-up bucking clean.
M1911 MK Series 21-Round Magazine FAQ
Which guns does the M1911 MK Series magazine fit?
The 1911 MK IV PTP, Black, 1911 MK IV PTP, OD Green and M1911A1.
How many BBs does it hold?
21 rounds.
Is it the stock magazine for the M1911A1?
No. It fits and functions in the M1911A1, but it is the stock magazine only for the M1911 MK series.
Do I earn KWA Rewards points on the M1911 MK Series 21-Round Magazine?
Yes. KWA Rewards members earn 1 point for every $1 on orders of $50 or more, so the M1911 MK Series 21-Round Magazine adds about 50 points, worth $1.00 in store credit (50 points = $1). See KWA Rewards.

