Click to expand Tap to zoom G&G GR16 Rotary Hop-up Chamber by G&G Armament Save Liquid error (product-badge line 32): -Infinity% $39.99 SKU G-20-015 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart A performance orientated rotary-style hop-up by G&G.