Magpul200189087
Magpul Mag1377-Mcb Dt Carbine Stock Mil-Spec$55.01
Availability: In Stock
The Magpul CTR Carbine Stock in Mil-Spec is a drop-in replacement buttstock built for AR15 and M4 carbines that use mil-spec sized receiver extension tubes. If you're running a mil-spec buffer tube on your carbine—whether it's a Colt, Armalite, S&W, LMT, or similar platform—this is a field-proven upgrade that tightens up your setup without unnecessary bulk. The streamlined A-frame profile keeps things snag-free, and the shielded release latch won't catch on gear or accidentally collapse mid-mission.
What makes the CTR stand out is the supplemental friction lock system that locks the stock down tight to the tube, eliminating the wobble that can creep into accuracy. You get a sloping cheek weld that stays comfortable even when fully extended, a 0.3" rubber butt-pad that grips your shoulder and won't slip under body armor or tactical gear, and ambidextrous QD sling mounts front and rear. The design keeps weight down—just 9 ounces—while the premium chrome-silicon spring promises years of reliable locking cycles. Made in the USA, and the Black and Flat Dark Earth models are TACOM approved for military M4/M4A1 carbines.
Length of pull ranges from 10.5" collapsed to 13.8" extended, giving you 3.3" of adjustment to dial in your cheek weld and shooting position. Magpul CTR Cheek Risers are sold separately if you want to run the stock fully extended or adapt it for rifles with rear-facing charging handles. Just confirm your buffer tube is mil-spec (not commercial-spec) before ordering—that's the only fitment detail that matters.
| Platform Compatibility | AR15, AR10, M16, M4, M4A1, M110, SR25 |
| Receiver Extension Size | Mil-Spec (1.14" O.D.) |
| Length of Pull, Collapsed | ~10.5" |
| Length of Pull, Extended | ~13.8" |
| LOP Adjustment Range | 3.3" |
| Stock Length (Max) | 6.9" |
| Weight | 9.0 oz (13.0 oz with receiver extension) |
| Butt-Pad | Removable rubber, 0.3" thick |
| Sling Mount | Ambidextrous QD (rear); accepts up to 1.5" swivels |
| Sling Loops | 1.25" (rear and bottom); lanyard hole at toe |
| Lock Spring | Premium chrome-silicon |
| Made In | USA |
| Military NSN (Black) | 1005-01-614-7778 |
| Military NSN (Flat Dark Earth) | 1005-01-616-4923 |
The CTR Mil-Spec model fits carbines with mil-spec sized receiver extension tubes (1.14" O.D.), common on Colt, Armalite, S&W, LMT, and other mil-spec platforms. It will not fit commercial-spec buffer tubes—if you have a commercial-spec tube, you'll need the CTR Commercial-Spec model instead. Check your tube diameter before ordering.
Yes. The supplemental friction lock system is designed to minimize excessive stock movement on the receiver extension, which helps reduce accuracy-robbing wobble. Performance may vary slightly depending on the dimensional tolerances of your specific receiver extension tube.
The CTR features an ambidextrous QD sling mount at the rear that accepts any push-button sling swivel up to 1.5" wide. It's also compatible with Magpul ASAP, ASAP QD, and other receiver-mount sling attachments. Sling loops (1.25") are located on the rear and bottom of the stock, and there's a lanyard hole at the toe for custom para-cord rigs.
The stock comes with a removable 0.3" thick rubber butt-pad. The receiver extension tube is not included and must be purchased separately if your carbine doesn't already have one. Optional Magpul CTR Cheek Risers are available separately for use with a fully extended stock or on rifles without rear-facing charging handles.
SKU: 200189141
Availability: In Stock
The Magpul CTR Carbine Stock in Mil-Spec is a drop-in replacement buttstock built for AR15 and M4 carbines that use mil-spec sized receiver extension tubes. If you're running a mil-spec buffer tube on your carbine—whether it's a Colt, Armalite, S&W, LMT, or similar platform—this is a field-proven upgrade that tightens up your setup without unnecessary bulk. The streamlined A-frame profile keeps things snag-free, and the shielded release latch won't catch on gear or accidentally collapse mid-mission.
What makes the CTR stand out is the supplemental friction lock system that locks the stock down tight to the tube, eliminating the wobble that can creep into accuracy. You get a sloping cheek weld that stays comfortable even when fully extended, a 0.3" rubber butt-pad that grips your shoulder and won't slip under body armor or tactical gear, and ambidextrous QD sling mounts front and rear. The design keeps weight down—just 9 ounces—while the premium chrome-silicon spring promises years of reliable locking cycles. Made in the USA, and the Black and Flat Dark Earth models are TACOM approved for military M4/M4A1 carbines.
Length of pull ranges from 10.5" collapsed to 13.8" extended, giving you 3.3" of adjustment to dial in your cheek weld and shooting position. Magpul CTR Cheek Risers are sold separately if you want to run the stock fully extended or adapt it for rifles with rear-facing charging handles. Just confirm your buffer tube is mil-spec (not commercial-spec) before ordering—that's the only fitment detail that matters.
| Platform Compatibility | AR15, AR10, M16, M4, M4A1, M110, SR25 |
| Receiver Extension Size | Mil-Spec (1.14" O.D.) |
| Length of Pull, Collapsed | ~10.5" |
| Length of Pull, Extended | ~13.8" |
| LOP Adjustment Range | 3.3" |
| Stock Length (Max) | 6.9" |
| Weight | 9.0 oz (13.0 oz with receiver extension) |
| Butt-Pad | Removable rubber, 0.3" thick |
| Sling Mount | Ambidextrous QD (rear); accepts up to 1.5" swivels |
| Sling Loops | 1.25" (rear and bottom); lanyard hole at toe |
| Lock Spring | Premium chrome-silicon |
| Made In | USA |
| Military NSN (Black) | 1005-01-614-7778 |
| Military NSN (Flat Dark Earth) | 1005-01-616-4923 |
The CTR Mil-Spec model fits carbines with mil-spec sized receiver extension tubes (1.14" O.D.), common on Colt, Armalite, S&W, LMT, and other mil-spec platforms. It will not fit commercial-spec buffer tubes—if you have a commercial-spec tube, you'll need the CTR Commercial-Spec model instead. Check your tube diameter before ordering.
Yes. The supplemental friction lock system is designed to minimize excessive stock movement on the receiver extension, which helps reduce accuracy-robbing wobble. Performance may vary slightly depending on the dimensional tolerances of your specific receiver extension tube.
The CTR features an ambidextrous QD sling mount at the rear that accepts any push-button sling swivel up to 1.5" wide. It's also compatible with Magpul ASAP, ASAP QD, and other receiver-mount sling attachments. Sling loops (1.25") are located on the rear and bottom of the stock, and there's a lanyard hole at the toe for custom para-cord rigs.
The stock comes with a removable 0.3" thick rubber butt-pad. The receiver extension tube is not included and must be purchased separately if your carbine doesn't already have one. Optional Magpul CTR Cheek Risers are available separately for use with a fully extended stock or on rifles without rear-facing charging handles.
SKU: 200189141