Heckler & Koch XM8
Heckler & Koch Alliant Technosystems
Verified Firearm Specifications
Search our database of normalized firearm specifications. Compare precise weights, barrel lengths, and action types across thousands of unique models.
Heckler & Koch XM8 vs SIG SG 550
Objective Side-by-Side
SIG SG 550
SIG Sauer AG (formerly Schweizerische Industrie Gesellschaft and Swiss Arms)
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
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