Magpul UCS Universal Carbine Stock, MAG1441, M1913 Picatinny Mount, Folding, Adjustable LOP, Flat Dark Earth, Rifle Stock The Magpul UCS (Universal Carbine Stock), part number MAG1441-FDE, is a folding, adjustable stock for firearms that mount the stock on a vertical M1913 Picatinny rail at the back of the receiver instead of a buffer tube. Many modern carbines and pistol caliber carbines use that rail interface, and the UCS gives them the adjustability shooters expect from an AR-15 stock: six length of pull positions over three inches, a reversible folding hinge, two tool-less cheek risers, a QD sling socket and an MOE SL butt-pad. It weighs 18 ounces and is made in the USA. Key Features M1913 rail interface: fits any firearm with an M1913 rail on the rear of the receiver, from the factory or through an aftermarket adapter Reversible folding mechanism: set it to fold to the left or right, whichever clears your charging handle and controls Half-slot height adjustment: the 1913 clamp can be set a half slot higher or lower for fine-tuning Five degrees of drop: angles the stock down for charging handle and ejection port clearance Six-position LOP: three inches of adjustment, with release buttons on both sides of the stock Two cheek risers: tool-less, removable and reversible, 0.50 in. and 0.75 in. tall QD sling socket: reversible and anti-rotation MOE SL Enhanced Rubber Butt-Pad: 0.70 in. pad for fast mounting and comfort in any gear Made in the USA: by Magpul One Stock for Many Platforms Rail-mounted stocks make a carbine easy to fold, but the factory stock on many of these guns is basic, fixed in length or awkward with body armor. The UCS is designed to be the ideal stock for the wide range of firearms using this interface. Magpul lists compatibility with the SIG MPX and MCX, FN SCAR, IWI Galil, CZ Scorpion, Ruger LC Carbine, the BRN-180 and certain AK variants such as the PSA AK and AK-V, plus other receivers with a factory or aftermarket M1913 rail. Because each host places its rail at a different distance from the trigger, the exact length of pull varies by platform. Magpul's known minimum to maximum ranges are: SIG MCX: 11.6 to 14.6 in. SIG MPX: 11.9 to 14.9 in. FN SCAR: 12.1 to 15.1 in. IWI Galil: 11.6 to 14.6 in. CZ Scorpion: 11.9 to 14.9 in. Ruger LC Carbine: 13.6 to 16.6 in. PSA AK: 12.0 to 15.0 in. Fold Either Way Charging handles, ejection ports and controls sit in different places from one gun to the next. The reversible hinge lets you choose which side the stock folds to, so it can lie flat against the receiver without blocking the charging handle or the ejection port. The five-degree drop also helps the stock clear those parts when it is extended. Set Your Fit Use the buttons on either side to move the stock through its six positions, short for armor or winter clothing and long for a bare-shoulder session at the bench. Add one of the cheek risers to raise your cheek weld for a red dot or a magnified optic, and use the half-slot clamp adjustment to fine-tune stock height. The MOE SL butt-pad has a rubber surface that grips the shoulder and mounts quickly. The QD socket can be set to either side to suit your sling. Compatibility Notes Per Magpul, the UCS is not compatible with Type 1 and Type 2 Sling Mount Kits, CTR, AK, or Hunter/SGA cheek risers, or with CTR, PRS or Hunter butt-pads. Use the risers and butt-pad that come with the stock. Check that your firearm has a standard M1913 rail at the rear of the receiver before ordering. Browse more stocks, or find a carbine to put it on in our rifles. Specifications Brand: Magpul Model: UCS Universal Carbine Stock Part number: MAG1441-FDE UPC: 840815149279 Color: Flat Dark Earth Mount: M1913 Picatinny rail on rear of receiver Folding: Yes, reversible left or right LOP adjustment: 6 positions, 3 in. total Stock length: 7.6 to 10.6 in. Length of pull: Varies by platform, see list above Height at butt plate: 5.3 in. Width, max: 1.9 in. at hinge Weight: 18 oz. Drop: 5 degrees Cheek risers: 0.50 in. and 0.75 in., included Sling attachment: Reversible, anti-rotation QD socket Butt-pad: MOE SL Enhanced Rubber Butt-Pad, 0.70 in. Made in: USA Frequently Asked Questions Will it fit an AR-15 buffer tube? No. The UCS mounts to an M1913 Picatinny rail at the rear of the receiver. It does not fit a buffer tube. Which guns does it fit? Magpul lists the SIG MPX and MCX, FN SCAR, IWI Galil, CZ Scorpion, Ruger LC Carbine, BRN-180 and certain AKs such as the PSA AK and AK-V, plus other receivers with a rear M1913 rail. Can it fold to either side? Yes. The hinge is reversible. What is the length of pull? It has three inches of adjustment over six positions. The actual range depends on the host firearm. Are cheek risers included? Yes, 0.50 in. and 0.75 in. risers come with it. Other Magpul risers such as CTR, AK or Hunter/SGA do not fit. How much does it weigh? 18 ounces. Order the Magpul UCS Universal Carbine Stock in flat dark earth from BattleHawk Armory.