The Aim Sports ARSTKCC Mil-Spec Black Synthetic 6 Position Collapsible M4 Stock Kit is a complete AR-15/M4 rear-end solution designed to finish out your rifle with a dependable, adjustable stock. Built around a reinforced polymer stock body and a mil-spec aluminum carbine buffer tube, it delivers solid lockup and smooth adjustment through six length-of-pull positions.

This kit includes the mil-spec receiver extension, standard carbine recoil spring and buffer, castle nut, and an ambidextrous sling mount end plate with QD swivel cup, giving you everything needed to install the stock on a compatible lower. Ideal for range use, training, and general-purpose rifle builds, it offers a comfortable shoulder fit and quick adjustment for different shooters or shooting positions. Aim Sports backs this design with a reputation for practical, budget-conscious AR accessories that focus on reliability and straightforward installation.

Key Features:

• Manufacturer: Aim Sports
• Model: ARSTKCC Mil-Spec 6 Position Collapsible M4 Stock Kit
• Firearm Type: Rifle
• Firearm Model: AR-15 / M4
• Type: Collapsible Stock
• Series: Mil-Spec
• Finish Color: Black
• Material: Polymer / Aluminum
• Tube Included: Yes
• Included Components: Mil-spec carbine buffer tube, recoil spring, buffer, castle nut, ambidextrous sling mount end plate, QD swivel cup