Description
Precision shooters running a semi-auto gas gun have long wished the humble Magpul CTR could feel more like a dedicated bolt-gun stock. That is exactly the gap Arisaka Defense set out to close. The Stock Angle Adapter bolts onto your existing CTR and re-angles the recoil pad so it sits perpendicular to the bore axis, giving you a flatter, more consistent shoulder contact and a rear end that actually helps you drive the rifle.
Developed alongside Mike Olivella of Praecore Performance, this adapter does three things worth caring about: it corrects the pad angle, it adds height and cant adjustment so you can dial the fit to your own build and optic height, and it opens the stock up to run Magpul SL, SL Enhanced, or SL Limbsaver pads. Keep in mind the factory CTR pad does not work with the adapter, so you will pair it with one of those SL-style pads. The payoff is a rear support surface with a little extra real estate for bag work and a cheek-to-pad relationship that mirrors a precision rig.
What the CTR Stock Angle Adapter Does on a Gas Gun
If you are building out an LMT MWS, KAC SR25, or a similar semi-auto precision platform, this is where the adapter earns its keep. The squared pad and the ability to tune height and cant let you settle into the same natural position shot after shot, which pays off when you are stacking hits at distance or shooting off a rear bag.
Build Quality on the Arisaka Stock Angle Adapter
It is CNC machined from 6061-T651 aluminum and finished with a MIL-A-8625 Type III hardcoat anodize, so it holds up to real range time and rough handling. The whole piece weighs about 3.5 ounces and adds roughly 0.70 inches to your length of pull, measured at the middle of the pad. It is made in the USA and fits the Magpul CTR, STR, ACS, ACS-L, and MOE carbine stocks, though it will not work with the MOE Fixed Stock.
Key Specifications
- Manufacturer: Arisaka Defense
- Manufacturer Part Number: SAA-CTR-BK
- UPC: 850036188230
- Color: Black
- Finish: MIL-A-8625 Type III Hardcoat Anodized
- Material: CNC Machined 6061-T651 Aluminum
- Weight: 3.5 oz
- Added Length of Pull: 0.70 in (at middle of pad)
- Stock Compatibility: Magpul CTR, STR, ACS, ACS-L, MOE carbine stocks
- Recoil Pad Compatibility: Magpul SL, SL Enhanced, or SL Limbsaver (sold separately)
- Country of Origin: Made in USA
What’s Included
- Arisaka Defense Stock Angle Adapter for Magpul CTR (Black)
- Mounting hardware
- Instructions
Frequently Asked Questions
Can I keep my factory Magpul CTR recoil pad with this adapter?
No. The OEM CTR pad will not fit the Stock Angle Adapter. You need to run a Magpul SL, SL Enhanced, or SL Limbsaver pad, which are sold separately.
Which stocks does the CTR Stock Angle Adapter fit?
It fits the Magpul CTR, STR, ACS, ACS-L, and MOE carbine stocks. It does not work with the Magpul MOE Fixed Stock, so double-check which stock you have before ordering.
What is the point of squaring the recoil pad to the bore?
On a gas gun, angling the pad perpendicular to the bore axis gives you flatter, more repeatable shoulder contact and better recoil management. Combined with the height and cant adjustment, it lets you fit the rifle to your body much like a dedicated precision bolt-gun stock.
How much does the adapter add to length of pull?
It adds roughly 0.70 inches to your length of pull, measured at the middle of the pad. That is worth keeping in mind if you already run a longer LOP, though the added rear surface area is a plus for bag work.





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