The M4-AKS P SB replaces your AKS-74U 'Krinkov' stock with a shock absorbing M16/M4 collapsible / side folding stock with a polymer joint. 

Advantages:

• Shock absorbing mechanism reduces recoil
• Non-slip design provides superior shoulder positioning enhancing tactical performance
• Tough and robust design
• After market sized 6061 hard anodized aluminum buffer tube
• recoil reducing buffer improves accuracy and "on-target" time during rapid fire
• Fit any M4 collapsible stock
• Built-in sealed batteries compartment
• Integrated quick detach sling swivel connectors on both sides
• Locking is released by the push of a button
• Spring lock on folded position
• Opens by a simple pulling motion and locks
• Left folding stock

Suitable for:

• AKS-74U (Krinkov) Variants