These carbon fiber octagonal handguards come with M-lock mount holes on each side and an adapter plate.

For barrels shorter than the handguard (barrel contained totally within the handguard), it is compatible with the Shorokh suppressor and any suppressor with less than 37 mm in diameter. If the barrel's end surpasses the handguard's (barrel sticks out from the handguard), then it can be used with any other suppressor.

Pin lock 16mm, rest and screws are included.
Optional: Eagle Vision adapter.
Optional: Carbon Fiber Hush Suppressor with endcaps for different calibers (.177/.22/.25 and .30)

294.5mm handguard:
Total length of handguard ~294.5mm.
Total weight of handguard ~196g.
Recommended for 350 MM (13.75") barrel.

423.5mm handguard:
Total length of handguard ~423.5mm.
Total weight of handguard ~230g.
Recommended for 450 mm (17.70") barrel.

534.5mm handguard:
Total length of handguard ~534.5mm.
Total weight of handguard ~300g.
Recommended for 600 mm (23.60") barrel.