Magpul Industries UCS Universal Folding Rifle Stock Ambidextrous Black. To accommodate a variety of charging handles styles ejection port locations and control locations the UCS features a reversible hinge for left and right folding configurations and five degrees of drop for clearance. The UCS ships with two exclusive Cheek Risers (0.50in and 0.75in) and when combined with the reversible M1913 clamp (allowing for a 1/2-slot height adjustment) the shooter can dial in head placement for an optimal sight picture using iron sights or optics. Offering three (3) inches of length of pull (LOP) adjustment spanning six (6) positions which can be changed via the LOP buttons on the sides the stock fits any shooter with and without armor or other bulky equipment. The UCS also includes a reversible anti-rotation QD socket for sling attachments and features the MOE SL Enhanced Rubber Butt-Pad 0.70in for user comfort. Specifications for Magpul Industries UCS Universal Folding Rifle Stock: Manufacturer: Magpul Industries Gun Type: Carbine Gun Make: Universal Gun Model: Universal Finish: Matte Hand: Ambidextrous Length: 7.6 - 10.6 in Weight: 18 oz Condition: New Number of Sling Points: 1 Fit: 1913 Picatinny Rail Attachment Type: Picatinny Features of Magpul Industries UCS Folding Rifle Stock PROVIDES EXTREME ADJUSTABILITY: Reversible folding mechanism to modify folding direction. Six (6) position push-button LOP adjustment allows three (3) inches of total change. Toolless removeable and reversible Cheek Risers for comb height adjustment (0.50in and 0.75in). ADAPTABLE TO MULTIPLE PLATFORMS: Compatible with all firearms with an M1913 rail on the rear of the firearms receiver. Reversible M1913 clamp allowing for a 1/2-slot height variation for further customization 5 drop angle for charging handle and ejection port clearance. SHOOTER CONFIGURABLE: Reversible anti-rotational QD socket for sling attachment MOE SL Enhanced Rubber Butt-Pad 0.70in included for rapid stock mounting and increased comfort. Designed to fit shooters with or without bulky gear. Package Contents: Magpul Industries UCS Universal Folding Rifle Stock What firearm models does the manufacturer say Magpul Industries UCS Universal Folding Rifle Stock is compatible with? The manufacturer suggests that Magpul Industries UCS Universal Folding Rifle Stock is compatible with UniversalMagpul Industries MAG1441-BLK: UCS Folding Rifle Stock Black