Jump Jet Replacement
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 ALIEN TECH Jump Jet Replacement Battery Pack  US $17.73
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 ALIEN TECH JUMP JET Replacement Foam Wing Tail Fin US $10.73
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 ALIEN TECH JUMP JET Replacement Prop 4 Prop Pack US $5.33
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 ALIEN TECH JUMP JET Replacement Motor US $3.38
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 ALIEN TECH JUMP JET Replacement Nose Cone US $3.18
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Reflex Sights For Rifles
Red dot or 'reflex' sighting systems now dominate civilian action shooting and are standard issue in the West's armed forces. Three companies - two American and one Swedish - now dominate the battle optic market with their offerings reflecting their differing perspectives on rapid and accurate target engagement in the most demanding of environments
Aimpoint of Sweden went for an extremely rugged 'tube' design, creating a range of sights that are parallax free beyond 50 meters - thus head position can be ignored in all but close range bullseye shooting for which these sights were not designed. Aimpoints come in many sizes featuring dots of different sizes for different applications. The US Army having standardized the Aimpoint CompM2 as its M68 is now purchasing the improved Model CompM4s. Note the small 's' in the model name. Aimpoints offer a somewhat narrower field of view than holographic sights when used with in-line night vision, but offer a far greater battery life - on some recent models at lower reticle brightnesses this can be years! Most Aimpoints are non magnifying, but you can add a quick detachable, flip-to-side magnifier to convert your Aimpoint into a 3X scope and back again in an instant. This gives the operator the flexibility to engage long range targets should these appear in an otherwise CQB scenario. Aimpoints are compatible with 'co-witnessing' or iron sights for emergency use should the main unit or its battery fail. An alternative is to use offset back up iron sights or a see thru mount, though the latter can position the sight too high for proper cheek weld. Some aimpoints come with mounts, but a a huge range of alternatives are available from Aimpoint and aftermarket suppliers to enable the Aimpoint to be used in almost any conceivable configuration.
Eotech take a radically different approach by employing a jet fighter style HUD with an aiming point projected to infinity. This ensures parallax free aiming regardless of range and gets rounds on target faster. Reticle design is more flexible and models are available with aiming patterns ballistically matched to the .223 Remington (5.56x45mm NATO) and .308 Winchester (7.62X51mm NATO) calibers. Holographic Weapon Sights (HWS) will still display the full aiming pattern if the screen is partially covered in mud or snow or even if it is completely smashed. The Eotechs are more difficult to protect from the elements than Aimpoints with optics that are awkward to cover. GG&G make a set of flip up covers for some Eotechs, but they don't really seal like the Butler Creek style ones typically used on Aimpoints Holographic Weapon Sights use up batteries far faster than Aimpoints, with battery lives measured in the hundreds rather than tens of thousands of hours - an automatic cut off is provided set to eight hours and user configurable to four. Eotechs do not boast the bomb-proof tubular construction of the Aimpoint, but are exteremely rugged. Eotechs have been adopted by USSOCOM, the 1st Stryker Brigade and the 3rd Infantry and 10th Mountain Divisions. US Special Forces Command demanded and got a 66 foot water proof depth - HWS have survived at this depth for days. Endorsement of their suitability for marine environment came from the Royal Navy which adopted an HWS for the defensive Dillon Miniguns mounted on its warshops and the auxiliaries of the RFA. Again a flip-to-side magnifier can be purchased - Aimpoint and Eotech magnifiers being effectively interchangeable. Some Eotechs include 7mm risers to aid night vision compatibility and the co-witnessing of iron sights. These models often have 'cantilevered' front ends to go over AR15 delta rings. Most Eotechs are night vision compatible - the most modern featuring brightness and NV buttons on the side of the unit to allow the magnifier or NV to be mounted right up to the back of the sight. Eotechs come with their own mounts to suit Weaver and Picatinny rails - depending on budget and desired amount of rigidity/detachability these can be bolt, thumb screw or ARMS type quick detachable throw levers. Eotech offer the alternative of CR123 or AA batteries in the full size models. The EXPS3-2 is a good example of an Eotech Holographic Weapon Sight.
Trijicon offer their Advanced Combat Optical Gunsight in a bewildering array of magnifications, objective lens sizes and reticles. ACOGs are essentially reflex sights that magnify and bridge the gap between reflex sights and scopes. Magnification extends the useful range of the ACOG dramatically. It is possible so use an ACOG with both eyes open, but, for closer range engagements, some now boast either peep and post back-up iron sights and/or mount a small 1X red dot sight on top. The British Army went down this route with the ACOG they adopted for their new L129A1 sharpshooters' rifle. The USMC have also opted for the ACOG as their standard optic with two units calibrated for the M4 carbine and flat-top M16A4 rifle. The M4 carbine variant is the TA31RCO-M4CP or AN/PVQ-31B. A key advantage of the ACOG is its non-reliance on batteries, relying on a tritium light source for night use and, in the models with a bright daylight aiming point, a fiber-optic light gatherer. ACOGs come either set up for the traditional M16/AR15 carrying handle or Weaver or Picatinny rails
Aimpoint, Eotech and Trijicon sights are now standard issue across the US Armed forces, displacing iron sights and increasing shooting scores dramatically. These are expensive precision instruments, so it is important to choose the right one. A 3X magnifier will turn either into a low powered scope in an instant. You need to decide how detachable the sight needs to be and whether you will be using it with iron sights and/or NV or a magnifier as this will dictate the model of sight and mount options. For a smaller magnified package at the cost of some loss in flexibility you can opt for the ACOG with an appropriate aiming mark/reticle. The ACOG's close quarter potential can be boosted by buying a model with its own back up iron sights or mounting a red dot on top. You also have the option of buying a low magnification model (magnifications down to 1.5X are offered). At the opposite end of the spectrum an ACOG magnifying reflex sight can make a rugged and versatile replacement for a traditional tube telescopic sight. These higher magnification models really benefit from an RMR back up red dot sight for closer engagements.
All three manufacturers offer a top quality product which will offer years of service in the toughest environments - choice will often be a combination of operational requirement, financial circumstances and individual preference - the latter often weighing most heavily.
Copyright. Chris Pieterman 2010.
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