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ROCK RIVER ARMS X-SERIES X-1 .308 WIN AR-308 18" FLUTED STAINLESS BARREL 20 RDS
$1,560.59$1,560.59×
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SIG SAUER MCX-SPEAR LT UPPER/CONV. KIT 5.56 11.5″ BARREL
| Barrel Length | 11.5 |
|---|---|
| Caliber | 5.56 |
| Condition | New in Box |
| Finish Per Color | Black |
| Manufacturer | Sig Sauer |
| Manufacturer Part Number | UAMCX-556N-11B-LT-BLK |
| Model | MCX-Spear LT Upper/Conv. Kit |
| Type | Uppers |
| UPC | 798681682539 |
Original price was: $2,029.99.$1,826.99Current price is: $1,826.99.
Buy NowSig Sauer MCX-Spear LT Features
The MCX-Spear LT Upper/Conversion Kit stands out with its dual rod recoil assembly, which innovatively eliminates the traditional buffer system, allowing for a more compact and efficient design. The M4 adapter enhances the kit’s versatility, enabling the use of Pic rail folding stocks and thereby expanding configuration options. An adjustable gas system allows for precise tuning, especially when using suppressors, optimizing performance under varying conditions.
A hallmark of this kit is its quick-change barrel design, allowing users to easily switch calibers and barrel lengths, adapting the firearm to different roles or preferences. The gas piston operating system minimizes carbon fouling on critical parts, extending the maintenance intervals and overall life of the firearm. Designed for durability, the kit’s components are engineered to endure 20k rounds before requiring any part replacements, supported by a next-gen suppressor designed QD flash hider for seamless suppressor integration.
Sig Sauer MCX-Spear LT Specifications
- Model: SIG MCX-SPEAR LT
- Caliber: 5.56 NATO
- Barrel Length: 11.5″
- Overall Length: 19.75″
- Weight: 4lb, 7oz
- Barrel: Nitride Coated Cold Hammer Forged
- Barrel Rifling Type: Hammer Forged
- Twist Rate: 1:7
- Operating System: Gas Piston
- Muzzle Device: 3-Prong/SIG Suppressor QD
- Muzzle Thread Pitch: 1/2-28
- Handguard Length: 10.23″
- Handguard Inside Diameter: 1.48″
- Handguard Material: Aluminum
- Receiver Finish: Black Anodized
- Bolt Carrier Group Included: Yes
- Bolt Carrier Finish: DLC
- Charging Handle Included: Yes
- Forward Assist: Yes
- Free Floated Handguard: Yes
Frequently Asked Questions – SIG SAUER MCX-SPEAR LT UPPER/CONV. KIT 5.56 11.5" BARREL
- How fast does this ship?
- Ships in 1‑3 business days to your licensed D.C. FFL dealer after purchase and registration.
- Do I need registration?
- Yes. DC requires firearm registration, including a mandatory 10‑day waiting period after purchase approval from MPD before pickup. Handguns require registration, magazines <=10 rounds.
- Is this legal in D.C.?
- Yes, provided it complies with D.C. law (registered, no assault features, magazine ≤10 rounds).
- Is the SIG SAUER MCX-SPEAR LT UPPER/CONV. KIT 5.56 11.5" BARREL suitable for me?
- This SIG SAUER MCX-SPEAR LT UPPER/CONV. KIT 5.56 11.5" BARREL is popular for uses like sig sauer.
- Popular searches by customers
| Model | MCX-Spear LT Upper/Conv. Kit |
|---|---|
| Type | Uppers |
| UPC | 798681682539 |
| Brand | Sig Sauer |
| Availability |
Shipping Policy – Washington, D.C.
Orders ship within 1‑3 business days to your selected licensed FFL dealer in D.C. Registration must be in process and CDP confirmed.
Return Policy
Non-firearm items returnable within 14 days if unused and in original packaging. Firearms sales are final once registered and possession occurs per D.C. code.
Consult our Return Policy page for more details.