The Zastava USA ZPAP M77 is a semi-automatic AK-pattern rifle chambered in 7.62x51 NATO (.308 Winchester). It runs a gas piston system with an adjustable gas block, and the barrel is cold hammer forged with a chrome lining. 
 

Key Specifications 

• Model: ZPAP M77 
• Caliber: 7.62 x 51mm | .308 WIN 
• Barrel Length: 19.7 inches 
• Capacity: 20+1 rounds 
• Weight: 8.60 lbs 
• Finish: Black with brown wood stock 
• Action Type: Semi-Auto (Gas Piston) 
• Safety Mechanism: Lever Safety 
• Sights: Adjustable front & rear iron sights 
   

Detailed Features 

 
The gas piston system operates differently from direct impingement designs -- gas is tapped to drive a piston rather than cycling gas directly into the receiver, which generally keeps the action cooler and cleaner. The adjustable gas block lets you tune dwell time for different ammunition or add a suppressor. The cold hammer forged, chrome-lined barrel extends bore life and handles corrosive or high-volume round counts better than an unlined barrel. 
 
The lever safety includes a bolt hold open notch so the bolt stays back when the magazine is empty. The barrel is threaded for suppressors or muzzle devices. The Promag adjustable stock allows length-of-pull to be set per shooter. Adjustable iron sights come standard.

The build quality is the consistent positive in ZPAP M77 discussions. Owners note it feels solid and well-constructed for the price, and the chrome-lined barrel is seen as a meaningful durability advantage over comparable rifles. Accuracy at medium ranges is generally described as satisfactory -- consistent groupings without needing to chase zero constantly.

The black-and-wood aesthetic is a genuine selling point for buyers who prefer it over all-black polymer. That comes up often enough to be a real factor in purchase decisions.

Ergonomics generate more mixed feedback. Some owners find the handling natural, especially those familiar with AK-pattern rifles; others find the weight distribution or dimensions less comfortable than an AR-10 layout. Personal preference plays a large role here.

Customization potential is mentioned positively -- the platform accepts aftermarket parts and the adjustable stock is a starting point for further work.

On the critical side: occasional magazine compatibility issues with third-party mags come up, and some owners report needing to find the right ammunition for reliable cycling. Parts availability and manufacturer support is a consideration for long-term ownership compared to more domestically common platforms like the AR-10.

The price-to-quality ratio gets favorable marks overall, and most comparisons to AR-10s or bolt-action .308s conclude that it holds its own for the intended use cases.