June 2003
Analysis Report 03-20
Marine Corps Warfighting Lab, Quantico, Virginia
Squad Advanced Marksman Limited Technical Assessment
Target Identification and Precision Fire Testing
Wendy R. Trickey
Appendix A: Rifle configurations
The following pages show lists and figures of the configurations of the 5 SAM-Rs and 3 M-16 A4s that we used for this testing. The SAM-Rs are numbered for reference to table 1. We assumed that there was no difference between the rifles’ performances. However, the precision values from SAM-R 1 were found to be significantly worse (by more than 20 percent) than the other SAM-Rs (t-test, p < 0.03). The figures also show the optic used with each SAM-R. All SAM-Rs were built to the 2-MOA specification. They were new, with no more than 150 rounds through them. They were fitted with Harris swivel bipods HBLM-S and A.R.M.S. quick release bipod mounts.
SAM-R 1
• Olympic Arms FIRSH free float tube
• Colt heavy barrel, chrome-lined, 1:7 twist
• No flip-up sights
• KMC scope riser rail
• KMC low profile scope rings
• Standard flash hider
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Figure 22. SAM-R 1 with TS-30 A1.
SAM-R 2
• PRI specific parts (Free Float tube, charging handle, pop-up front sight)
• A.R.M.S. rear pop-up sight
• Krieger 20-inch Stainless barrel 1:7 twist
• A.R.M.S. SPR full length rail
• KMC low profile scope rings
• Standard flash hider
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Figure 23. SAM-R 2 with TS-30 A1.
SAM-R 3 and SAM-R 5
• KMC Free Float Tube (FFRAS)
• Krieger 20-inch Stainless Steel Barrel with 1:7.75 twist
• KMC riser rail
• KMC scope rings
• KMC front folding sight
• KMC rear folding sight
• Standard flash hider
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Figure 24. SAM-R 3 with ACOG.
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Figure 25. SAM-R 5 with ACOG.
SAM-R 4
• KMC Free Float Tube (FFRAS)
• Douglas Chrome-moly Heavy Barrel with 1:8 twist
• KMC scope riser rail
• Badger low profile scope rings
• Standard flash hider
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Figure 26. SAM-R 4 with TS-30 A1.
= = = = =
What eventually fielded (only around 100 rifles)
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