AR Type Profiles
The following is a list of AR15 and AR10 type profiles that we are currently turning. Some of these are available as drop-in’s only and some are available as turned barrels only (not drop-in’s) and a couple are available either way. To see a CAD drawing of each profile click on the orange barrel profile name in the left column.| updated | Lilja AR-type Barrel Profiles |
blank |
blank |
gas sys. |
| 20FEB15 |
dia. |
length |
length |
|
| AR-15 & M-4 | ||||
| ar24 | .975″ diameter for 13″ then .936″ diameter for 1.900″ then .875″ | 1 | 24 |
rifle |
| diameter straight to muzzle. Will finish to 23″ (rifle-length gas) | ||||
| ar28 | same as AR24 above but for 28″ long blank | 1 | 28 |
rifle |
| ar750 | .975″ dia. For 13″ then .936″ dia. For 1.900″ then .750″ dia. straight | 1 | 24 |
rifle |
| will finish to 23″ (rifle-length gas) | ||||
| arclamp | .975″ dia. For 13″ then .875″ dia. For 1.75″ then .850″ dia. straight | 1 | 28 |
rifle |
| arwasp | secondary operation to relieve center section of above contours to .800″ diameter | 0.975 | 24 |
rifle |
| (shop note: turn blank end for end prior to turning) | ||||
| can be used on ar10, ar24 & ar750, arclamp contours, reduces weight of ar24 to 3.46 and ar750 to 3.12 pounds in .224 caliber and 24″ length | ||||
| m4 | lightweight 16.5″ long barrel for the M4 with a .750″ dia. gas block | 1 | 24 |
carbine |
| and carbine-length gas tube (shop note: turn to .975″ dia. first) | ||||
| rf 49 | 1.00″ for 13″ then .936″ dia. straight | 1 | 28 |
rifle |
| ar740 | .975″ dia. st. for 13″ then .750″ dia. for 1.9″ then .740″ dia. st. | 1 | 24 |
rifle |
| ar74028 | same as AR740 above but for 28″ blank, extra length is in .740″ dia. section | 1 | 28 |
rifle |
| ar740wasp | ar740 profiles above drawn with wasp section turned | 24or28 | ||
| secondary operation to turn wasp section to either of above two contours | ||||
| coltar | copy of original Colt AR lightweight barrel, .625″ dia. gas block | 1 | 24 |
rifle |
| 97524 | .975″ diameter with 45º section at muzzle (for shop use chambering | 1 | 24 | |
| drop-in barrels) | ||||
| mid1 | mid-length gas system similar to AR740 contour .740″ dia. In front of | 1 | 24 |
mid |
| .750″ dia. Gas block, .650″ dia. under hand guard | ||||
| mid2 | secondary operation to relieve hand guard section of mid1 to .650″ |
mid |
||
| (shop bote: hold backwards in lathe up to gas block) | ||||
| (shop note: same barrel profile as our Haas program O00303 but on 24″ blank) | ||||
| rugerpst | copy of Ruger gas piston system 5.56 barrel – .750″ block see drawing |
1 |
18 |
piston |
| AR barrels can be fluted on the .975″ dia. and/or the smaller dia. forward of the gas block | ||||
| hbar1 | H-Bar: .990″ for 2.50″ then .825″ dia. to 13″, .750″ gas |
1 |
28 |
rifle |
| block, then .720″ dia. to muzzle | ||||
| hbar2 | second step of hbar profile | |||
| ar15a2nn | copy of A2 with modifications – see drawing |
1.25 |
24 |
rifle |
| AR-10 type | ||||
| ar1028A | first step of AR10 contour, turns 1.000″ dia. To Z -25.5″, 1.200 at shank | 1.25 | 28 |
rifle |
| ar1028B | second step – turn .875″ and .940″ dia’s., use with ar1028a above | |||
| (shop note: slide into chuck up to 12″ point from chamber end) | ||||
| ar1030 | 1.200″ dia. For 17″ then .880″ dia. st. cylinder | 1.25 | 30 |
rifle |
| ar10H1&H2 | 1.200″ dia. for 3″ then .825″ dia. for 10″ then .750″ dia. gas block | 1.25 | 28 |
rifle |
| and then .740″ dia. to muzzle | ||||
| ar10mid1 | 1.200″ dia. For 3″ then .825″ dia. To 9.500″ then .750″ dia. For 1.900″ | 1.25 | 28 |
mid |
| then .740″ dia. To muzzle (for mid-length gas system with .750″ dia | ||||
| gas block) first step | ||||
| ar10mid2 | second step of above to turn .740″ and gas block | 1.25 | 28 |
mid |
| DPMStg1and2 | 1.200″ dia. for 4.5″ then taper over 1″ to 1.062″ dia. to 13″ | 1.25 | 28 |
rifle |
| DPMStg1and3 | alternative second step for DPMStg1 to have .940″ dia. to muzzle (no step down) | |||
| DPMStg4 | alternative second step for DPMStg1 to have rifle length plus 2″ gas block. | 1.25 | 28 |
rifle |
| 10740non1+2 | non drop-in version of AR10_740 profile w/wasp |
1.25 |
28 |
rifle |
| 1095non1+2 | Non drop-in version of AR1095 Profile | 1.25 | 28 | rifle |
| programs below used for AR10 blanks prior to chambering | ||||
| for drop-in’s only: | ||||
| rf 105 | 3.0″ of 1.200″ dia. then 45º transition to .975″ dia. to muzzle | 1.25 | 28 | |
| rf 106 | 3.0″ of 1.200″ dia. Then 45º transition to .975″ dia. to muzzle | 1.25 | 24 | |
| 45º at muzzle (set Z zero for 3.000″ of 1.200″ dia. ) | ||||
| AR2645 | same as rf 106 above but for 26″ blank (set Z zero for | 1.25 | 26 | |
| 3.000″ of 1.200″ dia. for correct position when chambering) | ||||
| AR2845 | same as rf 106 above but for 28″ blank (set Z zero for | 1.25 | 28 | |
| 3.000″ of 1.200″ dia. for correct position when chambering) | ||||
| shop note: AR1024 and AR10740 contours with muzzle threading in Haas lathe | ||||
