In StockSave 15%
HM Defense MonoBloc Upper 5.56 NATO / .223 Rem 16 Barrel
Sold byGrabAGun•Posted Apr 27, 2026
$675.99
$795.00
You save $119.01 (15% off)
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Deal Summary
- Currently in stock.
- Caliber: 223/5.56
- Category: parts
- SKU: GAG_16MBUP556-129381
- Brand: Hm Defense
Price History
Deal Details
MonoBloc Upper Features The MonoBloc Upper features a HM barrel with an integral machined patented gas block and a carbine gas system. It is also 4150 Chromoly match grade tripled honed and button rifled. Its handguard is free-floating and uses a Picatinny rial Magpul M-LOK and machined from 6061-T6 aluminum. Upper and Lower receiver are made of 7075-T6 aluminum with a hard coat anodized finish. The MonoBloc Upper also includes a patented HMB bolt Mil-Spec components charging handle an