Verified Firearm Specifications

Search our database of normalized firearm specifications. Compare precise weights, barrel lengths, and action types across thousands of unique models.

vs

Heckler & Koch XM8 vs SIG SG 550

Objective Side-by-Side

Heckler & Koch XM8

Heckler & Koch Alliant Technosystems

Heckler & Koch XM8 image

SIG SG 550

SIG Sauer AG (formerly Schweizerische Industrie Gesellschaft and Swiss Arms)

SIG SG 550 image

Heckler & Koch XM8 Specs Snapshot

Weight 120 oz
Barrel Length 12.5 in
Overall Length 33 in
Standard Capacity N/A
Caliber 5.56×45mm NATO
Action Type gas-operated
Avg Used Price $0.00
Avg New Price $0.00

SIG SG 550 Specs Snapshot

Weight N/A
Barrel Length 20.8 in
Overall Length 39.4 in
Standard Capacity N/A
Caliber 5.56×45mm NATO [ a ] 7.62×39mm (SG 553R
Action Type Gas operated , rotating bolt
Avg Used Price $684.00
Avg New Price $950.00

Differences At A Glance

Weight
Barrel Length -8.3 in
Overall Length -6.4 in
Standard Capacity
Caliber
Action Type
Avg Used Price -$684.00
Avg New Price -$950.00