AR-15 Parts & Accessories

Build and upgrade your rifle with our range of AR-15 parts and accessories at Onyx Armaments. Shop stocks, pistol grips, foregrips and backup sights for your AR15/M4 — proven, hard-use upgrades from the industry's leading brands.

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About this range

AR-15 Parts & Accessories, explained.

From a first drop-in grip to a complete precision build, find the right components to make your rifle fit, handle and shoot better. £5 tracked UK delivery in 7–10 business days.

Running a straight pull? These parts fit standard AR-15/M4 pattern lowers, handguards and buffer tubes, so they suit UK straight-pull and rimfire AR builds as well. If you're unsure about your rifle, ask us and we'll confirm fitment before you order. Read our straight-pull AR-15 parts guide for what fits and what does not.

Where should you start? Read our guide to the best AR-15 upgrades under £100, or browse all our buying guides.

Shop by category: Stocks, Precision Stocks, Grips & Foregrips, Iron Sights, Slings & Mounts, Bipods and M-LOK Accessories.