Magpul CTR Lower Build Kit – Black
The Magpul CTR AR-15 Lower Build Kit from Black Rifle Depot includes everything you need to complete your lower build project. It consists of a complete mil-spec lower parts kit, an M4 buffer assembly, a Magpul CTR stock, a Magpul MOE grip, and a Billet Enhanced Trigger Guard Kit. The Magpul CTR Lower Build Kit has been tested throughout the industry and is backed by a limited lifetime warranty.
Includes
- Mil-Spec Buffer Tube Kit
- Magpul MOE Grip (Black)
- Magpul CTRÂ Stock (Black)
- Billet Enhanced Trigger Guard Kit (Black)
- AR 15 Mil-Spec Lower Parts Kit
Complete Mil Spec Buffer Tube Kit
This Buffer Tube Kit is the perfect way to finish your lower receiver without breaking the budget! The lightweight and durable 7075-T6 aluminum 6-position receiver extension has proper MIL-SPEC dimensions to accept various aftermarket stocks. A coated carbine spring and a 3 oz buffer help ensure smooth, reliable function.
- 6-position 7075-T6 Aluminum Receiver Extension
- Buffer
- Castle Nut
- End Plate
- Spring
MOE Grip (Black)
The MOE Grip is a drop-in upgrade for the standard AR-15/M4 pistol grip. The ergonomic, hand-filling design combines anti-slip texturing with storage core capability. With a shape similar to a ‘medium-sized’ MIAD, the one-piece reinforced polymer construction provides simplicity and reduced cost while still maintaining the durability needed to withstand operational environments. The MOE Grip accepts optional Storage Cores for gear stowage and includes a basic grip cap. All mounting hardware included.
- Drop-In Upgrade For AR15/M16 Pistol Grip
- One Piece Reinforced Polymer Construction
- Storage Core Capability Accepts Optional Cores
- Designed To Improve Ergonomics
- Aggressive Texture For Positive Weapon Control
MAGPUL CTR Mil Spec Stock (Black)
The Magpul CTR (Compact/Type Restricted)—Mil-Spec model is a drop-in replacement buttstock for AR-15/M16 carbines using Mil-Spec-sized receiver extension tubes. Designed for light, fast action, the streamlined A-frame profile avoids snagging and shields the release latch to prevent accidental activation.
The CTR also features a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability* and an ambidextrous QD sling mount that will accept any push-button sling swivel. The Mil-Spec model includes a standard 0.3″ thick rubber butt-pad, which provides positive shoulder purchase to prevent slippage even with body armor or modular gear.
- Drop-in replacement for the standard M4 stock
- Friction locking mechanism to minimize excess movement
- A-frame design with a streamlined exterior
- Enhanced strength and ergonomics
- Reinforced polymer construction
- Shielded operation lever
- Push button ambidextrous
- Rubber butt pad
Magpul Enhanced Trigger Guard Kit (Black)
The Magpul MOE Enhanced Trigger Guard is a black anodized aluminum drop-in replacement for the AR15/M4 weapons platform. It features a shallow “V” shape for better glove use in tactical shooting or cold-weather operations. The Enhanced Trigger Guard is non-folding, has rounded edges, and fills the annoying “gap” at the rear of the standard trigger guard.
Complete AR-15 Mil Spec Lower Parts Kit
Black Rifle Depot’s OEM AR-15 Lower Parts Kit is assembled with top-tier quality American-made parts. With a crisp 6.5LB pull and minimal creep, these AR-15 Lower Parts Kits make a great upgrade over a standard Mil-Spec AR-15 LPK. These AR-15 Lower Parts Kits are sourced and used by some of the top manufacturers in the AR-15 industry. These are complete 31-piece kits and are compatible with AR-15 and variant lower receivers.  All parts are machined, and there are no MIM parts.
AR 15 LPK Parts Included
- Bolt Catch
- Bolt Catch Plunger
- Bolt Catch Roll Pin
- Bolt Catch Spring
- Buffer Retainer
- Buffer Retainer Spring
- Disconnect
- Disconnect Spring
- Hammer (Black Oxidize)
- Hammer Pin
- Hammer Spring
- Magazine Catch
- Magazine Catch Button
- Magazine Catch Spring
- A2 Pistol Grip
- Pistol Grip Lock Washer
- Pistol Grip Screw
- Pivot Pin
- Pivot Pin Detent
- Pivot Pin Detent Spring
- Selector
- Selector Detent
- Selector Detent Spring
- Takedown Pin (Front & Rear)
- Takedown Pin Detent
- Detent Springs (2)
- Trigger (Black Oxide)
- Trigger Guard
- Trigger Guard Roll Pin
- Trigger Pin
- Trigger Spring
- 100%Â American Made
Limited Lifetime Warranty *Warranty does not cover use with 80% lower.





Adam –
Magpul Lower build Kit
The kit had everything you needed to build an AR-15 lower and connect it to a complete upper. The components are typical except for the MOE grip. There is a storage compartment in the grip. The grip fits my large hands better than a standard grip and has a nice texture. Overall the build went well and I would buy this again.
Henry –
MAGPUL CTR LOWER BUILD KIT
Everything was in the kit as promised and expected, build went smoothly. Put another kit in the cart.