The Magpul CTR Carbine Stock (MAG310-BLK) is a black reinforced polymer collapsible stock built as a drop-in upgrade for AR-15, M16, M4, AR-10, M110, and SR25 platform carbines using mil-spec receiver extension tubes, combining a supplemental friction lock system, shielded latch, and ambidextrous QD sling mount into one of the most popular and proven AR stocks available.
Key Features
- Part Number: MAG310-BLK
- UPC: 873750001500
- Type: Collapsible carbine buttstock
- Color: Black
- Material: Reinforced polymer
- Compatibility: Mil-spec sized carbine receiver extension tube only, tube not included
- Compatible Platforms: AR-15, M16, M4, AR-10, M110, SR25
- Positions: 6
- Length of Pull, Collapsed: 10.5 inches
- Length of Pull, Extended: 13.8 inches
- Length of Pull Adjustment Range: 3.3 inches
- Stock Length, Maximum: 6.9 inches
- Stock Height, Maximum: 5.2 inches
- Stock Width, Maximum: 1.7 inches
- Stock Weight: 8.9 oz
- Weight with Receiver Extension: 12.7 oz
- Butt-Pad: Removable 0.30 inch rubber, anti-slip surface
- Sling Interface: Ambidextrous QD push-button swivel mount, 1.25 inch sling loops, lanyard hole
- Country of Manufacture: USA
Special Features
- The supplemental friction lock system is the defining upgrade over standard M4-style stocks, applying constant outward pressure against the receiver extension tube to eliminate the rattle and wobble that commonly develops in standard carbine stocks over time, tightening the feel of the stock without interfering with normal length of pull adjustment
- The shielded release latch is recessed and protected inside the A-frame profile, preventing the latch from snagging on gear, clothing, or vehicle interiors and stopping accidental stock collapse during dynamic movement or close-quarters use
- A premium chrome-silicon lock spring replaces the standard wire spring found in most factory stocks, resisting spring fatigue and relaxation over tens of thousands of cycles to maintain consistent positive locking performance throughout the life of the stock
- The sloping cheekpiece integrates a comfortable and repeatable cheek weld into the slim stock profile, providing a natural head position for both optic and iron sight use without adding bulk
- Side mounting slots on the stock body accept optional Magpul cheek risers for non-AR applications, extending the usefulness of the CTR platform to additional builds
- The removable 0.30 inch rubber butt-pad provides positive shoulder grip and prevents the stock from sliding on body armor, plate carriers, or soft clothing during sustained fire
Practical Benefits
- The Magpul CTR (MAG310-BLK) is the most straightforward wobble-eliminating stock upgrade available for any AR-platform carbine running a mil-spec tube, delivering a measurably tighter and more confidence-inspiring feel without requiring any modification to the rifle
- The 3.3 inch length of pull adjustment range across 6 positions accommodates a wide range of shooters from youth and smaller-framed adults at the collapsed end to larger shooters in lighter clothing at the extended end, making this a smart choice for shared or duty rifles
- The ambidextrous QD sling mount is positioned for both left and right-handed sling runs and accepts any standard push-button QD swivel, making sling integration fast and hardware-free for any standard two-point or single-point sling configuration
- The slim 1.7 inch width keeps the stock from interfering with support hand placement when shooting from unconventional positions, and the clean A-frame profile minimizes hang-ups on door frames, vehicle seats, and chest rigs
The Magpul CTR Carbine Stock mil-spec (MAG310-BLK) is a solid fit for any AR-platform shooter who wants to eliminate stock wobble, improve cheek weld consistency, and add a quality QD sling mount in a single drop-in upgrade built in the USA.
| MANUFACTURER | MAGPUL |