The Sig Sauer MCX Rattler is one of the most compact 5.56 rifles you can buy. A 5.5" barrel and an ultra-thin folding stock bring the overall length down to just 23", and the MCX short-stroke piston system keeps it running clean and reliable in a gun this short.
Why it stands out
- Extremely compact: 23" overall
- Short-stroke piston MCX action
- Ultra-thin folding aluminum PDW stock
- Matchlite Duo trigger
- M-LOK aluminum handguard
Specifications
| Caliber | 5.56 NATO / .223 |
|---|---|
| Barrel | 5.5" carbon steel |
| Twist | 1:7 |
| Overall length | 23" |
| Weight | Approx. 6 lb |
| Magazine | 30 rounds, AR-pattern |
| Trigger | Sig Matchlite Duo |
| Part number | RMCX-5B-TAP-SBR |
| UPC | 798681601165 |
Buying a short-barreled rifle from Guns 2 Ammo
SBRs are National Firearms Act items, registered with the ATF. Order online or in store, then complete your Form 4 transfer at our Mesa shop. We explain the process, fees and timelines on our NFA & Class III page.
Outside Arizona? We can ship to your local SOT dealer to complete the transfer. Not available in CA, CT, DC, DE, HI, IL, MA, MD, NJ, NY or RI.
Questions? Call (602) 715-2677.
| Manufacturer | Sig Sauer |
| Model | MCX PDW SBR |
| Caliber | 5.56 NATO / 223 Rem |
| Type | Silencer |