Pin Screw
Choosing A Holographic Weapon Sight
You want to put a holographic sight on your rifle, but which one to choose? However, each sight is a unique combination of features from which you can choose to get the sight which best suits your application. Take the time to work through the following list and you’ll have the right sight for you!
Suitability for use with NV. To keep the price down, Eotechs intended for action shooting, hunting and most law enforcement applications are supplied without the night vision settings. The models without night vision are the XPS2 series, 512, 516 and 517.
Cost. The most inexpensive Eotechs are those without night vision compatability, intended for hunting. These are the 512, 516, 517 and XPS2 series.
Close mounting of night vision or magnifiers. If you want to mount NV or a magnifier right up to the rear of the unit, pick a model with its NV and brightness buttons on the left hand side. These models are the EXPS series, 556 and 557 (the 516 and 517 have this feature but are not night vision capable).
Mounting height. To enable co-witnessing in the bottom third of the sight, and to allow the maximum adaptability to different night vision sight configurations, some Eotechs come supplied with a 7mm riser.These are the 516, 517, 553, 555, 556 and 557. The QD mount supplied with the EXPS is 7mm higher than the integral unit of the XPS series.
Mounts. Three mounting systems are available for the Eotechs depending on whether you want the scope essentially permanently mounted (allen bolt), want to take it off easily, but in no particular hurry (thumb screw) or need to be able to swap quickly (ARMS throw lever). The XPS, 516, 517, 556 and 557 use the thumb screw, the EXPS, 553 and 555 have quick release levers and everything else uses alan bolts.
Delta ring clearance. Some Eotechs are made so that their battery housing is cantilevered to clear the Delta ring (the ring that retains the handguard) on AR15/M16/M4 rifles. The XPS, EXPS, 516, 517, 556 and 557 are designed with this feature.
Length. Eotechs vary greatly in length. This is an important consideration with night vision rigs. The AA battery models are longest, followed by the CR123 battery models and the shortest are the XPS and EXPS models. The XPS and EXPS are 3.5″ long, the 553 4.9″, the 556 5.0″, the 512, 516 and 552 5.4″and the 517, 555 and 557 5.6″.
Ballistic reticle. Only three models feature ballistically compensating dots – the 557.AR223 is matched to the .223 round, the 552.XR308 to the .308 Winchester and the 552.XR500 to the .50 Browning Machine Gun. The 557.AR223 has side mounted brightness and NV buttons whilst on the 552.XR.308 they are positioned at the rear. A two dot arrangement is employed by the XPS2-2, XPS3-2 and EXPS3-2.
Batteries. In an endeavour to boost battery life and availability Eotech switched from ‘N’s to the AA and CR123. The choice boils down to AA or CR123 and there are often models that only differ in this respect (the 553 and 555 for example). The AA has significantly longer battery life when used with lithiums (1000hrs vs 600) but CR123 models are more compact. The XPS and EXPS use a single transverse mounted CR123, the 516, 553 and 556 two CR123s and the 517, 552, 555 and 557 two AAs.
DoD type classification. The main military use models are the 552 and 553 series – the latter specifically designed for and used by United States Special Forces COMand (SOCOM). The 555 is an AA battery 553 and thus shares its heritage.
Color. For hunting, the 512 series can be supplied in black, Realtree APG HD or Mossy Oak Obsession. The 553.A65 is comes in black or tan.
Integrated laser. Only the EOLAD series have integrated lasers.
Copyright Chris Pieterman 2010.
Mosin Nagant Firing Pin Adjustment- using the back screw
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2.5mm Real VVS Diamond Solitaire Wedding Jewelry Nose Lip Screw Stud Ring Pin $259.00 |
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Real Si 7 Diamonds Flower Tragus Earring Nose Lip Piercing Pin Ring Stud Screw $258.00 |
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2.5mm Real VVS Diamond Solitaire Wedding Nose Lip Screw Stud Ring Piercing Pin $258.00 |
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Peerless Projector Adapter Plate $60.99 Peerless Projector Adapter Plate |